GB/T 261-2021 Active National standards

GB/T 261-2021 Determination of flash point—Pensky-Martens closed cup method

Publish Date: 2021-10-11 Implement Date: 2022-05-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 261-2021

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Petroleum products

ICS Name: Integrated oil products

Publish Date: 2021-10-11

Implement Date: 2022-05-01

Pages: 21 pages

Scope

This document specifies the method for determining the flash point of flammable liquids, liquids with suspended particles, liquids that tend to form a film on the surface under test conditions, and other liquids using the Binsch-Martin closed-cup flash point tester.
Note 1: Although kerosene with a flash point above 40 °C can be tested using this document, kerosene is generally measured according to GB/T 21789. The flash point of lubricating oils is usually measured according to GB/T 3536.
Note 2: Jet fuels with a flash point below 40 °C can be tested using this document, but the precision of this method has not been verified for such fuels.
Warning: Due to the fact that some mixtures do not yield the flash point defined in this document, but instead exhibit significantly increased flash fire (not due to haze effects) and changes in the color of the flash fire from blue to yellow-brown, continuous heating can lead to the combustion of vapors around the test cup.
This document is applicable to samples with a flash point ranging from 40 °C to 370 °C. This document includes three test steps: Step A, Step B, and Step C. Step A is applicable to distillate fuels (including diesel, biodiesel blending fuels, heating oils, and turbine fuels), lubricating oils, paints and varnishes, and other homogeneous liquids not included in the scope of Step B and Step C. Step B is applicable to residual fuel oils, diluted asphalt, used lubricating oils, liquids with suspended particles, liquids that tend to form a film on the surface under test conditions, or liquids with viscosities unsuitable for heating at the stirring speed and heating conditions specified in Step A. Step C is applicable to the determination of BD100 biodiesel samples. This document is not applicable to water-based paints and water-based varnishes.
Note 3: When monitoring lubricating oil systems, the flash point of used lubricating oils can also be determined using Step A for comparison